10min:

HONGZHI LI, CRISTIAN FOCSA, BERNARD PINCHEMEL, PETER F. BERNATH AND ROBERT J. LE ROY, Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.

The A ^{1 +}-X^{1 +} emission spectrum of BaO from a Broida-type oven was revisited using a Fourier transform spectrometer. A total of 82

vibrational bands of ¹³⁸BaO were measured in the range of 8,900 to 21,000 cm^-1 at a resolution of 0.004 cm^-1. The vibrational quantum number of the Ground state was observed up to v'' = 20 and up to v' = 11 for the excited A state. In addition, 72 bands from ¹³⁷BaO, ¹³⁶Bao and

¹³⁵BaO isotopomers were also measured. Over 15,000 rotational lines

were analyzed at a precision of about 0.005 cm^-1. Significantly improved spectral constants for the ground state are obtained.